Caption: Pancreatic cancer. Artwork of part of the digestive system, showing a carcinoma (white, lower right) of the head of the pancreas (light brown). Also shown are the gall bladder (green) and the duodenum (pink), the first part of the small intestine. Arteries (red) and the common bile duct and pancreatic duct are also shown. The head of the pancreas, adjacent to the duodenum, is the most common site of pancreatic cancer. Pancreatic cancer often causes no symptoms until it is well established and untreatable.